package com.zzyl.framework.interceptor;

import com.zzyl.common.exception.base.BaseException;
import com.zzyl.common.utils.StringUtils;
import com.zzyl.common.utils.UserThreadLocal;
import com.zzyl.framework.web.service.TokenService;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author: zhengsuyang
 * @Desc:
 * @create: 2025-10-16 19:51
 **/
@Component
public class MemberInterceptor implements HandlerInterceptor {
    @Autowired
    private TokenService tokenService;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1. 从请求头获取token
        String token = request.getHeader("authorization");
        // 2.判断token是否为空
        if (StringUtils.isEmpty(token)){
            throw new BaseException("认证失败");
        }
        // 3. 不为空解析token
        try {
            Claims claims = tokenService.parseToken(token);
            // 4. 判断claims是否为空
            if (StringUtils.isEmpty(claims)){
                throw new BaseException("认证失败");
            }
            Long id = claims.get("id", Long.class);
            UserThreadLocal.set(id);
        } catch (Exception e) {
            throw new BaseException("认证失败");
        }
        // 5. 放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 渲染完毕，手动执行垃圾回收
        UserThreadLocal.remove();
    }
}
